//
//  MainTabBar.swift
//  SinaWeiBo
//
//  Created by 有风 on 16/2/2.
//  Copyright © 2016年 YouFeng. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {

    
    
    override func layoutSubviews() {
        super.layoutSubviews()
        //tabbaritem的大小
        let width = self.bounds.width / 5
        let height = self.bounds.height
        let rect = CGRect(x: 0, y: 0, width: width, height: height)

        //tabbaritem的frame
        var index : CGFloat = 0
        for subview in subviews{
            if subview.isKindOfClass(NSClassFromString("UITabBarButton")!){
                subview.frame = CGRectOffset(rect, width * index, 0)
                index += (index == 1 ? 2 : 1)
            }
        }
        plusBtn.frame = CGRectOffset(rect, 2 * width, 0)
    }
    
    lazy var plusBtn : UIButton = {
        let btn = UIButton()
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: .Normal)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: .Highlighted)

        
        
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: .Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: .Highlighted)
        
        self.addSubview(btn)
        return btn
    }()
    /*
    // Only override drawRect: if you perform custom drawing.
    // An empty implementation adversely affects performance during animation.
    override func drawRect(rect: CGRect) {
        // Drawing code
    }
    */

}
